A Digitization Initiative · Blue Hill Observatory & Science Center
An initiative to digitize and open 141 years of continuous atmospheric observation — the longest unbroken weather record in the Western Hemisphere — making it freely available to researchers, educators, and the public for generations to come.
Since 1885, Blue Hill Observatory has recorded temperature, precipitation, wind, pressure, humidity, snowfall, and dozens of other atmospheric variables — every single day. The data exists. But most of it is not usable.
Decades of records survive as handwritten ledger entries, photographed logbooks, and scanned image files — not as structured, machine-readable data. Climate researchers, emergency managers, insurance actuaries, and educators cannot query, analyze, or build on this archive without manually reading each page.
This is not a preservation problem. The records are safe. It is an access problem — and one that a single, focused investment can permanently solve.
The Blue Hill Observatory Record will transform 141 years of atmospheric observations into a freely accessible, structured digital resource — built for the next century of climate research, education, and public service.
No other weather station in the Western Hemisphere offers this length and consistency of continuous record from a single fixed location. Open access will benefit an extraordinarily wide range of users — permanently and at no ongoing cost.
141 years of unbroken data enables long-term trend analysis, extreme weather baselines, and century-scale climate modeling that shorter records simply cannot support.
Historical storm frequency and intensity at this resolution informs infrastructure planning, risk modeling, and regional disaster preparedness at every level of government.
Real historical data transforms science education. Students can investigate how their region’s climate has changed within living memory — using authentic, place-based records.
Deep historical weather records underpin catastrophe modeling. Long, consistent records reduce uncertainty in risk assessment for extreme weather events nationwide.
High-quality, consistent labeled climate data is in short supply. The Blue Hill Observatory Record is a uniquely clean and deep training resource for next-generation weather and climate models.
Anyone will be able to explore local climate history — the coldest winter on record, the driest decade, the stormiest spring — with data collected faithfully since 1885.
The Blue Hill Observatory Record requires a single, time-limited investment to digitize an archive that took generations to build. Once complete, it is open and self-sustaining — there is no recurring cost.
141 years of daily observations. One investment. Free, forever. No weather station in the Western Hemisphere has maintained a record like this. Digitizing it now — while institutional knowledge and physical records are intact — is a time-sensitive opportunity to preserve and open a truly irreplaceable piece of America’s scientific heritage for researchers, students, emergency managers, and citizens across the country.
Blue Hill Observatory & Science Center was founded in 1885 atop Great Blue Hill in Milton, Massachusetts. It holds the longest continuous atmospheric record in the Western Hemisphere and is recognized as a National Historic Landmark, a World Meteorological Organization Centennial Observing Station, and an active participant in the NOAA Climate Reference Network.
The Observatory is a 501(c)(3) nonprofit serving researchers, educators, weather professionals, and the general public through educational programs, real-time observations, and published climate data.
The Blue Hill Observatory Record is strengthened by broad community backing. We are actively seeking letters of support from research institutions, universities, state and local officials, and professional organizations who would benefit from open access to this archive.
Are you a researcher, educator, meteorologist, or community leader who would benefit from open access to 141 years of continuous atmospheric data? We welcome letters of support from any institution or individual who can speak to the value of this resource.
Contact Blue Hill Observatory & Science Center to learn how your organization can support The Blue Hill Observatory Record.
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